Airline shares fell sharply after the CDC and Frontier Airlines said they were searching for 132 Passengers who flew with the latest Texas Ebola patient earlier this week.
The NYSE Arca Airline index, Dow Jones Transportation Average and the SPDR S&P Transportation ETF accelerated losses after the news broke. The averages were last trading lower.
United Continental, American Airlines and Republic Airways were among the biggest losers in the industry.
Initially higher, JetBlue fell around 2 percent while Ryanair lost about 3 percent after the report surfaced.
Airline stock declined largely since the Ebola crisis expanded to the U.S. last month on fears that the spread of the virus will spark lower travel demand.